Newbrain Display

From: Tony Duell <ard_at_p850ug1.demon.co.uk>
Date: Mon Jan 31 17:58:48 2005

>
> Near to the Nec FIP display in the Newbrain computer there is a little
> circuit with a componet with 10 pins where you can read:
>
> 27
> CD-1867N
> TDK
> JAPAN

I haev the official Newbrain scheamtics here....

That component is probably a transformer. The module it's part of is a
DC-DC converter to run the display. It has, apparently, 7 connections :

1) +5V input
2, 5) linked together, seem to be a -ve output (22uF to ground
3) Output,also -ve (22uF togoround, also goes to Vbb on the DS8881, and
   the pull-downs on the segment (anode) leads)
4,6 ) Heater outputs to the display

>
> Somebody know what is this component? I think it is used to control voltage
> supplied to de display.
>
> Somebody have the NEC FIP16A5R datasheet? It is the 16 character display in
> the Newbrain AD

I can at least tell you :
Heater : 1,37
Grids (digit select) : 3,5,7,9,14,16,18,20,22,24,27,29,31,33,35
Anodes (segments) : 4,6,8,10,13,15,17,21,23,25,28,30,32,34

-tony
Received on Mon Jan 31 2005 - 17:58:48 GMT

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